Most importantly, the software update fixes a bug with the
phone's camera software that caused some images taken in daylight
to appear blurry. There are also some fixes for Wi-Fi, Bluetooth,
and messaging.

The software update will only work on Lumia phones in the U.S.,
but Nokia says it'll roll out globally soon. If you have a Lumia
920 or 820, you'll receive a notification when the software is
ready to download.